Finding the Fourth Proportional to 16,682.75, 23,021.82 and 9,129

Step by Step Solution

1. Step 1: Write the proportion equation
   16,682.75 : 23,021.82 = 9,129 : x
2. Step 2: Convert to fraction form
   16,682.75/23,021.82 = 9,129/x
3. Step 3: Cross multiply
   16,682.75x = 23,021.82 × 9,129
4. Step 4: Simplify right side
   16,682.75x = 210,166,194.78
5. Step 5: Solve for x
   x = 210,166,194.78/16,682.75
6. Step 6: Final answer
   x = 12,597.82